纳米MnO_2粉体的固相合成及其电化学性能 (Ⅲ)固相氧化还原反应合成纳米α-MnO_2的性能

纳米材料在光、电、磁方面的特性使其在催化，磁性材料，传感器，医学，生物学等方面有特殊应用．纳米材料比常规电极在电化学性能方面有一定的优越性［１～５］．已成功地合成出多种纳米材料［６，７］．本文采用固相氧化还原反应体系直接合成出纳米αＭｎＯ２，并用Ｘ...

Synthesis of Nanosize MnO2 by Solid State Reaction and Its Electrochemical Property .Synthesis and Performance of MnO2

Nanoparticles of MnO2 were prepared by onestep solid state redox reaction at room temperature or 60 . The solid state reaction was studied by XRD and TEM observation. It is shown that the time of grinding directly affected the crystalline type of the products from amorphous MnO2 to unstable MnO2 and stable MnO2. The reaction rate of KMnO4 with MnCl24H2O was greater than that with Mn(Ac)2H2O. The dischrge capacity of MnO2 nanoparticles was larger than that of International Common Sample No.1 electrolytic MnO2 especially in heavy load discharge.